Effects of Y2BaCuO5on the directional growth of YBa2Cu3Oxsuperconductor

✍ Scribed by Kwangsoo No; Daesung Yoon; Woo Suck Shin; Wonbaek Kim; Gunchoo Shim

• Publisher: Springer
• Year: 1994
• Tongue: English
• Weight: 768 KB
• Volume: 29
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00363425

✦ Synopsis

The effects of YzBaCu05 on the microstructure and superconducting properties of YBa2Cu30x samples, textured using the directional growth of Y2BaCuOw BaCu02 and CuO powder mixtures, were studied. Y2BaCu05 moved downward as the sample passed up through the hot zone, and this downward movement affected the superconducting properties of the directionally grown samples. The critical temperature increased, and the resistance transition width decreased as the excess 21 1 content in the powder mixture increased up to a value, beyond which the temperature decreased and the width increased. The critical current densities of the directionally grown samples were scattered because of the presence of uncontrollable severe cracks perpendicular to the growth direction. As the hot-zone temperature increased, the critical current density of the directionally grown sample increased up to a maximum value ( > 6000 A cm -2) beyond which the critical current density decreased. Compared to data from other studies, the hot-zone temperature required to produce a maximum critical current density was lower.